The act of placing your thumb in your rectum, and using the other four fingers to scratch and paw at your grundle(*see Angry Spider). Then tell your partner to place there thumb in your rectum as well and to overlap there fingers over yours and copy the same movements as you.

This forms the image of an octopus with its head stuck in a hole.

Say Chuck, would you like to perform a Mis-Informed Octopus with me tonight....